I belive a 285/75/16 is roughly a 33/10.5/16 so you will need a bit more than a camel cut. For that you will need flexi arches. I would suggest you fit the lift kit then see how the steering is i.e does it self centre some trucks can get away without caster arms. personaly i wouldnt fit pro comps just had one of mine let go but it has been on 2 1/2 years but i always thought they where a bit bouncy on the road just ordered some terrafima's.Hope this helps a little